The former Crimewatch presenter was hoping to take part in the new series of the ITV1 show, which kicks off on 4 January, however he has now undergone an operation that has ruled him out.
Earlier this week, Rav - who used to date Chantelle Houghton - tweeted a picture of his leg bolted into a traction brace following his op.
The ex-policeman told his followers: "Shorts in this weather...?"
On December 20, Rav also Facebooked his fans, saying: "Packing for my away trip tomorrow. (Shame its just a hospital bed)."
Earlier this year, Rav got engaged to Loose Women producer Jill Morgan.
Prior to his operation, Jill tweeted: "So poor Rav can't do Splash as he's badly injured himself in training. Major op tomorrow to fix his leg. Fingers crossed it all goes well."
Get well soon, Rav!
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